Remote control device



April 6, 1937.

E. L. BARRETT 2,075,972 REMOTE CONTROL DEVICE Filed Nov. 8, 1933 l 2Sheets-Sheet/l April 6, 1937. E. L. BARRETT REMOTE CONTROL DEVICE FiledNOV. 8, 1933 2 Sheets-Sheet 2 a ...Mw

am @j Patented Apr. 6, 1937 PATENT OFI-Ice REMOTE CONTROL DEVICE EdwardL. Barrett, La

Grange, lll., assignor to Utah Radio Products Company, Chicago, Ill., a

corporation of Illinois Application November 8,

13 Claims.

The invention relates to remote control devices and particularly todevices which are especially adapted for controlling the operation of aradio receiving set from a distant point.

5 An obj-ect of the invention is to provide an improved device of thischaracter embodying a novel and compact arrangement of partswhichprovide a small, neat control unit capable of being operated with greatease and affording sensitive and lo accurate control of the set'.

Another object is to provide a device of this character having noveloperating means in which rictional resistance to manipulation is largelyeliminated.

A further object is to provide a device of the reciprocating iiexible'cable type which embodies, in connection with. said cable, a rotatablemember engageable by said cable and arranged to confine the associatedpart of said cable against independent movement, whereby friction due torelative movement between the cable and a conning part is`v eliminated.

Another and more specific object is to provide a rotatable member forengagement with a flexible cable in. which a cable receiving groove islocated in a side face of the rotatable member'.

In conjunction With the foregoing, another object is to provide novelmeans for guiding a cable into a receiving groove in a reciprocablemember at an angle to the lineof reciprocation of the groove.

A further object residesV in the provision of a re'- mote control deviceinvvhich a plurality of control mechanisms are compactly disposedsubstantially side by side for alternate or selective engagement by acommondriving member.

More specifically stated, another object is to provide a. pairofcombined gear andy pulley elements, preferably of the internal ring geartype, which are rotatably mounted on a suitable base for operativeengagement selectively by av manipulable pinion, said gears being, ifdesired, of different dimensions.

Afurther object is to provide, in a remote control device for radioreceiving sets having adjustable instrumentalities, such as condensersand a volume control, and having a circuit controlling switchoperatively associated with one of said instrumentalities, selectivelymanipulable means for adjusting either of said instrumentalities, andlocking means associated in a novel manner with said manipulable' meansand capable of automaticallyV locking the switch in circuit breakingcondition.

Other objectsI and advantages will become aprie 1933, serai No. 697,146

parent in the following description and from the accompanyingV drawings,in which:

Figure 1 is ak somewhat diagrammatic view on a reduced scaleillustrating a control device embodying the features oi the invention.

Fig. 2 is an axial section through the remote control mechanism and istaken along the line 2-2 of Fig. 1.

Fig. 3 is a sectionalV view taken at right angles to the section of Fig.2 as indicated by the line 3 3 of Fig. 1.

Fig. i is an enlarged view in section showing a detail of the lockingYmechanism.

Figs. 5', 6, 7 and 8 are transverse sections through the controlmechanism'taken as indicated by the lines 5 5, 6-6, T-l, and 8*---8'0f`Fig. 2;

Fig. 9 is an irregular section through the control mechanism toillustrateV the means for guiding the flexible elements into engagementwith the actuating members and is takenr along the line --Soi Fig. 3.

Figs. 10' and 11` are irregular sections through the control mechanismon the condenser shaft' and onthe volume'control shaft respectivelyasindicated by the linesy Ill---Il'lVV and II-I IV of Fig. 1.

The general arrangement of elements, as shown in Fig. l, comprisesbriefly a remote control mechanism 2l) adapted to be secured at anysuit' ableipoint which is convenient to the operator of the vehicle,such as,v the steering column 2|, said mechanism being operativelyconnected with one or more of the movable adjusting parts of a radioreceiving set, generally indicatedat 22. In'thls4 instance, these partsare a rotatable condenser shaft 23Y and an actuating shaft 24'for thevolume control rheostat or potentiometerr 25. The operators manipulationof a single knobA or finger piece 26 is effective, as will hereinafterbecome more clearly apparent, to control the position of adjustmentofthe condenser shaft or f the volurne control device.

Particular reference Will be had to Figs. v2., 3 and to 9, inclusive, indescribing one preferred form of the remote control mechanism 20. Themechanism is housed in a suitable casing, preferably comprising. a Abase21 and a cover' 28 detachably connected in any suitable manner. Abracket 29- on the outer side face of the base is provided for mountingthe mechanism in place. The base is of. substantial thickness and theinner surfaceV thereof has two circular recesses 30 and 311 therein,each arranged to receive a rotatable member 32'-, 3?V respectivelyconstituting'theV actuating or operating` member by. which theV con.-

denser and volume control shafts are adjustably driven.

Where, as in the present instance, the volume control shaft is one ofthe parts of the set to be adjusted, the rotatable member which isoperatively connected to said shaft, in this instance the rotatablemember 32, may be substantially smaller in diameter than the othermember 33 which is connected with the condenser shaft. 'Ihis differencein diametric dimensions is best seen in Figs. 2, 5 and 8. The dimensionsof the circular recesses 39 and 3'! correspondingly differ and are ofsuch size that the rotatable members 32 and 33 are seated snugly yetrotatably in their respective recesses.

In this embodiment, the rotatable members 32, 33 are in the form ofinternal ring gears and the parts are arranged to permit these gears tobe selectively or alternately actuated by a common pinion 34. To thisend, the recesses 30, 3l and the rotatable members 32, 33 are so relatedthat at one point the pitch diameters of the gear teeth lie insubstantially the same tangential plane. The pinion 34 is rigid with atubular shaft 35 which is reciprocably and rotatably supported from thebase by such means as a fixed shaft 35a. Preferably, the shaft 35aextends through the outer gear 33 to provide a rm support within theshaft 35 and pinion when the outer gear 33 is engaged by the pinion. Thesupporting means for the pinion is disposed with respect to thetangential point of the pitch diameters to produce engagement of thepinion with the gear teeth on one or the other of the rotatable members32, 33, this engagement being selected by axial reciprocation of thepinion. One end of the shaft 35 extends through the cover 28 to receivethe finger piece 26.

The rotatable members 32, 33 are preferably assembled on the base in thefollowing manner: The members are axially spaced and are locatedsubstantially side by side, with the smaller diametered member 32positioned innermost of the base in the deepest recess 30. Substantiallycentrally of the base is an outstanding lug 36 which in cross section isin the form of a wide crescent (see Figs. 5, 7 and 8). 'I'he outside orlarger arcuate periphery of the lug 36 provides a surface 31 (Fig. 5)over which the gear teeth of the smaller rotatable member 32 ride, whilethe smaller arcuate periphery defines, in part, a nest 38 for the pinion34. Also outstanding from the base is a second but smallercrescent-shaped lug 39, the outer or convex surface of which is disposedfor engagement with the gear teeth on the larger rotatable member 33.This lug is located substantially opposite the pinion 34. Interposedbetween the two rotatable members 32, 33 is an annular spacing ring 40(Figs. 2, 3 and 5) which is held against rotation by such means as aninterlocking nib and recess arrangement 4l. One of the functions of thespacing ring is to separate the rotatable members 32, 33 so that thepinion 34 cannot engage both of the rotatable members 32, 33 at the sametime.

The parts are held in the above described relationship by a clampingplate 42 which is secured in overlying relation to the outer rotatablemember 33 preferably by means of a small screw 43 engaging the lug 36.On the side of the plate 42 adjacent the base is a crescent-shaped boss44 (Fig. 2) which fits inside the smaller lug 39 on the base, bearsagainst the outer surface of the annular spacing ring 40, and completesthe surface over which the gear teeth 0n. the rotatable member 33 ride.Such means as a pin 45 (Figs. 2, 5 and 6), on the lug 39, engaging anaperture 46 (Figs. 2 and 6) in the clamping plate designates the properposition of the plate and holds the plate against rotation. The clampingplate maintains the proper assembly of the parts but it is preferred tomaintain the rotatable members under a slight resilient or yieldingmovement resisting force. Thus, at spaced points, in this instancethree, the clamping plate 42 is peripherally recessed, as at 41 (Figs. 3and 6), to expose portions of the underlying rotatable member 33.

A spider 48 of resilient material has a leg for each of the recesses 41,the ends of said legs being inwardly oiTset to bear against the exposedsurface of the rotatable member 33. The spider may be suitably andadjustably secured in place by the screw 43 to exert a variable forcedirectly against the outer rotatable member 33 and indirectly againstthe inner rotatable member 32. Preferably a washer 49 of fibrousmaterial is seated in a rabbetted groove on the rotatable member 33 forengagement by the ends of the spider arms, which ends may have inturnedprongs thereon perfecting the engagement. This washer produces africtional resistance in opposition to movement of the rotatable memberwhich may be varied by the screw 43, and serves to maintain the parts inany of the Various positions of adjustment.

The clamping plate 42 does not extend entirely to the periphery of therotatable member 33 to clear an offset portion or flange 50whichoverlies the margin of the recess 3| and is annularly grooved onits outer surface to receive a side edge of an indicating drum 5l. Theconventional tuning indicia on the drum are visible through an aperture52 (Figs. 2 and 5) located in the cover to face upwardly toward theoperator when the mechanism is assembled on the steering column. Abracket 53 on the outer face of the clamping plate 42 supports a lamp 54for illuminating the indicia on the drum. Preferably one side of thelamp circuit is grounded to the casing and a lead 55 (Figs. 3 and 5)constituting the other side of the circuit extends through a suitablebore 56 in the base and clamping plate.

Preferably, means is provided for holding the pinion 34 for operativeengagement with one or the other of the rotatable members 32 and 33. Asshown in Fig. 6, one form of such means comprises a socketed member 51mounted on the clamping plate in support of a spring urged ball 58 orthe like for engagement with either of a pair of annular grooves 59(Fig. 2) on the pinion shaft 35. The bracket 53 and the support 51 mayinclude upstanding posts fashioned for engagement by screws 66 (Figs. 3and 6) which extend through the cover to secure it to the base.

The connections between the rotating members 32, 33 and the volumecontrol and condenser shafts respectively are of the reciprocating cabletype and comprise, as shown in Fig. 7, a flexible power transmittingelement 6| (preferably a stranded cable), a helicoidal winding 62 whichis flexible and snugly encircles the element 6|, and au outer protectingsheath 63 of fabric or the like.

The cables are connected with the rotating elements in such a manner asto eliminate the possible imposition of frictional resistance tomovement on those portions of the cable which engage the rotatablemembers. The relationship between one rotating element (for exampleelement 32) and its associated cable will be described, sincesubstantially the same structure is employed for both rotatable members.As shown in Figs. 2 and 3, the rotating member 32 has aside face whichruns in contact with the base of the circular recess in which saidmember is mounted. 'Ihis face of the member has a circular groove 64(see also Fig. 7) therein which faces toward the `base of the recess andis dimensioned snugly to receive the end portion of the associated cable6|. The end of the cable is secured to the rotatable member in anysuitable manner.

The groove thus provides radially spaced walls, the inner one of whichis a working surface about which the cable is wound when a pull isexerted on the cable by rotation of .the member, while the outer wallprovides a working surface which restrains the flexible cable lagainstoutward radial movement when a thrust force is imparted to the cable.The cables are held against lateral movement out of the groove by theopposed surface of lthe base. In connection with the rotatable member33, it 'should be noted that the spacing ring 40 serves as an opposingface for preventing laterally outward movement of the cable from thegroove throughout those portions of the rotatable member 33 whichoverlie the recess in which the rotatable member 32 is located.

The feature of this arrangement of parts is that the flexible cable isclosely confined in its groove against independent movement relative toits associated rotatable member and that radial movement of the cable isprevented by means which moves with the cable. Consequently friction dueto wipingof the cable across a stationary 'part does not occur and theoperative relationship between the cable and the rotatable member isentirely frictionless.

Guide means is provided for directing the longitudinal movement of eachcable into its respective groove and the preferred guide means includesa passageway which extends substantially tangentially of the groove andat an angle to the face of the rotatable member in which the groove islocated. The preferred arrangement can best be seen in Fig. 9. The rearouter face of the base is. at an appropriate point (generally at thelower side of the base), cut away to provide an opening in the base ofeach recess 30, 3| and located opposite to the grooves 64 when the partsare assembled. Surfaces 65 on the base 21, which terminate at saidopenings, slope gently inwardly thereto. These surfaces 65 are instepped relation so that they may communicate properly with theirrespective recesses.

A closure plate 66, capable of being detachably secured to the base asby one or more screws 61, has surfaces thereon which are complementarytol the sloping surfaces 65 and the surfaces are longitudinally grooved,as at 68, to provide passageways for the exible cables 6|. The grooves68, when the parts are assembled, are directly alined with the grooves64 in the rotatable members 32, 33 so that the cables are guided intoand out of the grooves in the rotatable members substantiallytangentially and at a gently sloping angle thereto. The cables,therefore, approach the groove 64 at angles to the lines of movement orreciprocation thereof and at the prop-er points are bent into engagementwith said grooves. The cables are thus positively coniined against otherthan longitudinal movement whereby lost motion or back-lash iseliminated. For convenience the ends of the helicoidal winding andfabric which house the flexible cable may be securely clamped betweenthe base 21 and the closure plate 66.

Each of the rotatable elements 32, 33 has an arcuate pin and slo-tarrangement for limiting the extent of rotation of said members. Thus,as shown in Fig. 8 the face vof the rotatable member 33 opposite thebase of its recess 3| has an arcuate groove 69 therein which cooperateswith a pin 1|]v formed o-n the base. The limiting means which isassocia-ted with the rotatable member 32 also cooperates with thelocking mechanism and for this reason the present structure,'as shown inIFig. 4, has an arcuate groove 1| located in the base of its recess 3Bfor cooperation with a pin 12 on the rotatable member 32,

The locking means, which is herein provided, is capable vofautomatically locking the apparatus in its inoperative position. Radioreceiving sets conventionally have a switch device 13 (Fig. l)associated with one ofthe .tuning elements (usually the volume controldevice) to break the power circuit when the tuning element reaches onelimit fof movement. Herein the switch is vshown in its conventionalassociation with the volume control device 25, which device, in thepresent instance, is controlled by the rotatable member 32. The stop pin1.2 is positioned to engage one end of the arcuate groove 1| when thevolume -control device has been turned to the position in which theswitch is open. Reciprocably mounted in a bore in the base 21 is a,

plunger 14 having one end movable into and out of the path of the pin 12and the other end eX- tending into a pocket 15 formed in the outer sidei of the base adjacent to the bracket 29.

The end of the plunger 14 terminates in an l angular portion 16 locatedin the pocket. Such means as a leaf spring 11 bears against the angularportion 16 normally to urge the plungeryl' inwardly of the base. Theplunger is so located that when the pin 12 is substantially in abutmentwith the end of the arcuate groove 1|, the end of the plunger `isdisposed ,in front of the pin 12 to prevent movement thereof. vof thepin and plunger, which meet as the pin moves toward the vaforesaid endof the groove, are arcuate as indicated at 1-8 to allow the pin to movepast the plunger.

A key slot 19, which traverses the angolari por-tion 16 of the plunger,is arranged to receive a key A8|) or similar device by which the plungermay be lifted and held with the end thereof clear of the slot 1|. Thisarrangement permits the operator to lock the receiving lset againstunauthorized `use. Insertion of the key into the slot moves the plungerso that the rotatable member 32 may be actuated. Initial movement ofsaid member closes the switch to establish the power circuit. When theoperator wishes to shut off the receiving set, the key is withdrawn andthe end of the plunger 14 enters the slot 1 I. Rotation of the member 32to break the circuit through the switch moves the pin 12 past the end-of the plunger 14 and the mechanism is automatically locked ininoperative condition. .If desired, the key may be withdrawn after thereceiving set has been placed in operative condition and receptioncontrolled in the usual manner until .the operator turns the mechanismto break the circuit through the switch.

The reciprocatory movement which is imparted to the flexible cable 6| bythe remote control mechanism 20 may be transmitted to the condensershaft through a spring pulley structure The surfaces i similar to thatshown in my earlier' Patent No. 1,926,256, issued September 12, 1933.However, an improved structure has been provided in the nature of aunitary attachment for facilitating assembly of the attendant parts onthe condenser shaft and for reducing the amount of force required torotate said shaft. This structure is shown in Fig. l, and particularlyin Fig. 10.

The condenser shaft 23 projects through a side wall 8| of the receivingset chassis and through an auxiliary supporting plate 82 which isdetachably secured to the wall 8|. A cup-like housing 83, which issecured to the shaft 23 through a hub 84, encloses a coil spring 85having one end attached to the cup and the other end to a nib 86 struckout of the plate 82. The hub carries a segmental gear 81 meshing with areduction pinion 88 which is rotatably supported on a stub shaft 89fixed to the plate 82. The hub of the pinion 88 carries a peripherallygrooved pulley 9D. The flexible cable 6I is dlrected into engagementwith the pulley groove by means of a detachable clamp 9| carried by abracket S2 on the plate 82, which holds the end of the helicoidalwinding 62 adjacent and tangential with-respect to the pulley groove.The spring 85 is connected to exert its force in a direction which willexert a pull on the flexible cable 6 I, thus holding the cable taut andsupplementing the thrust force which is transmitted to the cable by therotatable member 33.

The volume control shaft 24 may be actuated by its flexible element 6|through substantially the same mechanism as has been described inconnection with the condenser shaft. However, since the volume controlshaft normally requires considerable operating force. an antifrictionconnection, resembling that between the rotating members 32, 33 andtheir associated cables. is preferably employed. Referring to Figs. land 1l, the volume control shaft 24 extends from the casing whichencloses the control through an externally screw threaded bushing 93.The outer end of the shaft carries a disk fixed thereto which has acircular groove 94 in one side face thereof. This groove receives theend portion of the flexible cable 6l which is suitably secured to thedisk. A stationary plate 95 is mounted between lock nuts 96 on thebushing and is positioned closely in opposition to the open face of thegroove to confine the iiexible cable therein. The plate has an annularbracket 81 thereon which slopes toward the groove in the disk and thisbracket carries a detachable clamp 98 for securing the end of thehelicoidal winding 62 in position to direct longitudinal movement of theflexible cable substantially tangentially and angularly into the groove.By this construction, the use of a spring for rotating the shaft 24 inone direction is unnecessary, since both end portions of the cable areso confined that a thrust force may be efiiciently transmitted to thecontrolled one of the rotating parts.

In describing the operation, it is assumed that the parts are properlyassembled substantially as shown in Fig. 1 and that the mechanism islocked in inoperative condition. The operator inserts the key 88 tounlock the device and then by rotation of the finger piece 26 drives therotatable member 32 which, through reciprocation of the associatediiexible element 6l, rotates the volume -contnol shaft 24 and moves theswitch to close the power circuit. An outward pull on the knob 26 shiftsthe pinion 34 from a driving engagement with the rotatable member 32into a similar engagement with the rotatable member 33. Rotation of thefinger piece 26 will now effect an adjustment of the condenser shaft 23to position the condensers at any desired point. The finger piece 26 maythen be shifted inwardly to adjust volume. When the operator wishes todiscontinue reception, the key is withdrawn and the volume control shaftrotated until the circuit through the switch is broken. As thisoperation takes place, the device becomes automatically locked againstfurther operation. Of course, if the operator merely wishes todiscontinue reception temporarily, the key need not be withdrawn.

It will be evident from the foregoing that a novel remote control devicehas been provided which embodies an improved relationship of parts bywhich the tuning manipulation may be accomplished with the utmost ease.Frictional resistance of relatively moving parts has been so largelyeliminated that the mechanism is manipulable with no more eortthan-would be required in the direct operation of the tuning devices.

I claim as my invention:

1. A control device comprising, in combination, a base having a recesstherein, a pair of rotatable members mounted in said recess for movementrelative to each other and to said base, each of said members having anannular groove in a side face thereof, a pair of flexible powertransmitting elements, guide means on said base for directing themovement of said power transmitting elements into said grooves, saidrotatable members having gear teeth thereon and being arranged so thatsaid gear teeth are alined at least at one point, and an actuatingpinion selectively engageable with the gear teeth on one or another ofsaid elements at said point.

2. A control device comprising, in combination, a base having a recesstherein, a pair of internal ring gears mounted in said recess formovement relative to each other and to said base, each of said ringgears having an annular groove in a side face thereof, a pair offlexible power transmitting elements, guide means on said base fordirecting the movement of said power transmitting elements into saidgrooves, the gear teeth on said gears being alined at least an actuatingpinion selectively engageable with the gear teeth on one or another ofsaid elements at said point.

3. A control device comprising, a base, a pair of for movement relativeto each other and to said base, each of said members having a baseopposing groove therein, a pair of iiexible power transmitting elements,guide means on said base for directing the movement of said powertransmitting elements into said grooves, said members having gear teeththereon arranged in alinement at least at one point, and an actuatingpinion selectively engageable with the gear teeth on one or another ofsaid elements at said point.

4. In a remote control device for radio receiving sets adapted forinstallation in a vehicle, the combination with a volume control devicein said set having a rotatable adjusting shaft, of a disk secured tosaid shaft having a groove in a flat face thereof, a non-rotatable plateopposing said groove and having means thereon defining a passagewaycommunicating with said groove, a remotely positioned member mounted forrotation and having a groove in a flat face thereof, means incombination,

at one point, and

members mounted on said base opposing said groove and having apassageway therein communicating with said groove, a flexible powertransmitting element having its end portions extending through saidpassageways and secured respectively to said disk and to said remotelypositioned member, and a flexible guide tube enclosing saidpowertransmitting element and rigidly connected to communicate at itsopposite ends with said passageways.

5. A remote control device comprising a housing having a base adap-tedto be secured to a supporting member and within said housing having apair of circular recesses of diierent diameters, an internal ring gearseated in each recess, said recesses being alined so that at one pointthe pitch diameters or" said gears are substantially in the sametangential plane, a pinion having a supporting shaft journaled in saidbase for axial movement and so located with respect to said point thatsaid pinion may be selectively engaged with one or the other of saidgears, a exible power transmitting element for each gear, said gearshaving grooves therein for receiving variable lengths of said flexibleelements, and guide means on said base for directing longitudinalmovements of said elements into and out of said grooves.

6. A remote control device comprising a. housing having a base adaptedto be secured to a supporting member, a pair oi gears disposed side byside and movably mounted on said base, a pinion having a tubularsupporting shaft, a stub shaft rigid with said base and receivable insaid tubular` shaft to support said tubular shaft and pinion whereby thepinion may be selectively engaged with one or the other of said gearsand is rigidly supported in either position, a flexible powertransmitting element for each gear, said gears having grooves thereinfor receiving variable lengths of said exible elements, and guide meanson said base for directing longitudinal movements of said elements intoand out of said grooves.

7. A remote control device comprising a housing having a base adapted tobe secured to a supporting member and within said housing having A apair of circular recesses, internal ring gears seated in said recesses,a driving pinion for selective engagement with either ring gear, spacingmeans between said gears to prevent simultaneous engagement by saidpinion, a clamping plate for holding the parts assembled, stationarymeans defining nests in which said gears and pinion rotate, and iiexiblemeans for transmitting the movement of said gears to parts to becontrolled.

8. A remote control device comprising a housing having a base adapted tobe secured to a supporting member and within said housing having a pairoi circular recesses, internal ring gears seated in said recesses, adriving pinion for selective engagement with either ring gear, clampingmeans for holding said gears assembled, adjustable means for imposingresistance to movement on said gears including a friction washer bearingagainst one of said gears and resilient means bearing against saidwasher, and flexible means for transmitting the movement of said gearsto parts to be controlled.

9. In a remote control device for radio receiving sets, a unitaryassembly for establishing an operative connection with the condensershaft comprising, in combination, a plate for attachment to a stationarypart of the receiving set, a shaft ixed on said plate, a pulley disk onsaid shaft for connection with a power transmitting element from acontrol mechanism, a pinion rigid with said pulley disk, a housinghaving a gear meshing with said pinion, means for attaching said housingto the condenser shaft, and a spring in said housing connected to exertits force between said housing and said plate.

10. A control device comprising, in combination, a base having a recesstherein, a pair of rotatable members mounted in said recess for movementrelative to each other and to said base, a pair of flexible powertransmitting elements respectively connected to said rotatable members,means selectively engageable with said rotatable members for relativemovement of one of the members at a time, one of said members having avperipheral portion overlapping the edge of said base defining saidrecess, and indicia means on said overlapping portion for visuallyindicating the relative adjusted position of said one member.

11. A remote control device comprising, in combination, a base, means onone side of said base for connecting the same to a support, a pair ofrotatable members mounted on the opposite side of said base, a shaftjournaled in said base and including means selectively engageable withsaid rotatable members for relatively rotating the same, a manipulablemember on said shaft for effecting such selective engagement, meansconnected with each of said rotatable members for connection withremotely positioned devices to be controlled, and lock means forpreventing movement in one position of one of said rotatable members andextending through said base and operable from the rst mentioned sidethereof.

12. In a remote control device, the combination of a base includingmeans on one side for securing the base to a supporting structure, saidbase having a recess in the side opposite said means and an aperturecommunicating through the base with said recess, a. rotatable membermounted in said recess for movement relative to said base and having agroove therein opening in a direction paralleling the axis of saidmember and in assembly opposed to the base of said recess, said groovebeing in registration with said aperture at all points of rotation ofsaid member, a flexible power transmitting element passing through saidaperture into said groove and being secured to said member for slidablemovement through said aperture as an incident to movement of saidmember, and means for moving said member.

13. In a remote control device, the combination of a base includingmeans on one side for securing the base to a supporting structure, saidbase having a recess in the side opposite said means and an aperturecommunicating through the base with said recess, a rotatable membermounted in said recess for movement relative to said base and having agroove therein opening in a direction paralleling the axis of saidmember and in assembly opposed to the base of said recess, said groovebeing in registration with said aperture at al1 points of rotation ofsaid member, a exible power transmitting element passing through saidaperture into said groove and being secured to said member for slidablemovement through said aperture as an incident to movement of saidmember, gear teeth on the periphery of said member, and an actuatingpinion engaging said gear teeth and having operating means coactingtherewith for rotating the pinion to drive said member and move saidflexible element relative to said base.

EDWARD L. BARRETT.

